When percussion or hammer drilling the percussion mechanism is
called a DTH or down the hole hammer. This drilling tool is located
directly above the down hole hammer bit. The driller transfers
weight to the bit through the drill pipe as well as provides some
rotation. Through the use of a compressor, the pressurized air is
forced to the down hole hammer. As the drilled hole gets deeper the
driller adds more drill pipe to the string. The piston strikes the
impact zone of the hammer bit; hammers are always used as part of a
casing advancement system and can be used in reverse circulation
applications. DTH hammers are common when drilling blast holes and
water wells.

Suitable choice of raw material, advanced processing technology and
perfect quality warranty.With hardened treatment, drilling life can be extended and then
cost can be reduced.

Size range 1-2’’,3 ’’, 4’’, 5’’, 6’’, 8’’, 10’’, 12’’ etc.

Shank styles:

BR1,BR2,BR3;

ND25ND474,ND525,ND55C;

NM4,NM5,NM6,NM8;

IR3.5;

DHD3.5,DHD340,DHD350,DHD350R,DHD350Q,DHD360,DHD380,DHD112;

COP44,COP54,COP64,COP84;

QL40,QL50,QL60,QL80;

Mission40,Mission50,Mission60,Mission80;

SD4, SD5, SD6, SD8,SD10,SD12;

QI40,QI50,QI60,QI80;

NUMA100,NUMA120,NUMA125.

Applications

It is mainly used in geological exploration, coal mine, water
conservancy and hydropower, highway, railway, bridge, construction
and so on.

Specifications

NQL SeriesHigh Air Pressure DTH Hammers Without Foot Valve

Technical Data

Length(Without Bit)

NQL4A

NQL5A

NQL6A

NQL8A

NQL95A

1070mm

1090mm

1183mm

1330mm

1340mm

Weight(Without Bit)

40.00kg

67.00kg

90.00kg

171.00kg

203.00kg

External Diameter

Ø99mm

Ø126 mm

Ø165mm

Ø180/Ø185mm

Ø203mm

Bit Shank

QL40

QL50

QL600

QL80

QL80

Hole Range

Ø110-Ø135mm

Ø155-Ø203mm

Ø155-Ø203mm

Ø195-Ø254mm

Ø216-Ø254mm

Connection Thread

API2 3”/8REG

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

API3 1”/2REG

API4 1”/2REG

API4 1”/2REG

Working Pressure

1.2-2.0Mpa

1.3-2.3Mpa

1.5-2.5Mpa

1.5-3.0Mpa

1.8-3.0Mpa

Impact Rate at 17 Bar

30HZ

28HZ

25HZ

22HZ

22HZ

Recommended Rotation Speed

20-30r/min

20-35r/min

20-30r/min

15-25r/min

15-25r/min

Air Consumption

1.0Mpa:5.0m³/min

1.8Mpa:9.0m³/min

2.4Mpa:14.0m³/min

1.0Mpa:7.0m³/min

1.8Mpa:14.0m³/min

2.4Mpa:19.0m³/min

1.0Mpa:9.0m³/min

1.8Mpa:18.0m³/min

2.4Mpa:26.0m³/min

1.0Mpa:12.0m³/min

1.8Mpa:22.0m³/min

2.4Mpa:28.0m³/min

1.0Mpa:16.0m³/min

1.8Mpa:28.0m³/min

2.4Mpa:39.0m³/min

Feature Advantage

1.Price commitment: in order to ensure the high reliability of
products, raw material selection are using grapefruit brand
products; under the same competitive conditions, and not to reduce
product technical performance on the basis of sincerity at a
favorable price to customers.

2.Quality commitment: product manufacturing and testing have
quality records and inspection data; the performance of the product
can withstand customer inspection.

3.Customer service: in order to create new diamond brand, enhance
the visibility of enterprises,establish corporate image, we serve
customers with the principle of "preferential prices, good service,
reliable product quality" principle.

The appearance of the picture is different from that of the actual
product, and the actual product is the standard.